Definition: polite and showing respect Level: C2
我们收到了一个非常礼貌的回复。
We received a very ___courteous reply.
图书馆员工值得祝贺：他们都非常礼貌且乐于助人。
The library staff deserve congratulations: they are all very ___courteous and helpful.
他对同事总是很礼貌。
He is always ___courteous to his colleagues.
